C# enums vs Constnats vs #defines

A constant will refer to a value that never changes, that you may need to reference often in a program. For example:

<lang pre="cs">
const long SpeedOfLight= 299792458;


Enums are pretty much constants, just neater. It also acts a list of sorts. Say you have a method that returns the cure to a disease, it can look like this:

public enum Disease { TB, AIDS, Cancer, Flu }

public string Cure(Disease d)
{
      switch(d)
      {
          case Disease.TB:
               return "Blah";
               break;
        ......
       }
}        

Thats pretty much the best I can do. I would recommend a Google search to get a more in depth answer.

-Dom